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Category Archives: Designs

Making a Trepanning Tool – Notes and Plans

I’m planning on cutting some gear wheels and, having struggled with using a hole-saw to cut blanks, decided a trepanning tool was probably the answer. The tool is only meant for cutting 1/8″ thick stock. Tested on brass and aluminium (may not be up to the job with steel). Use low speeds and if you […]

Making Elmer’s “Tall Vertical Open Column”

The late Elmer Verburg designed quite a few relatively-easy-to-build model engines. All are made from bar stock. The second one I have made is #32, the “Tall Vertical Open Column”. As many people do, I made a number of minor changes. These are described here, along with some construction notes I wrote to help myself, […]

Making Dice in Brass (or other metal)

Here are some notes on making dice (or just one die) in brass (etc) in the metalwork shop, suitable for a total beginner. I did it with my 10-year old. I used some half-inch square brass stock. Set the stock in the lathe using a 4 jaw chuck. Get it close to centred by sighting […]

Wallace & Gromit Inspired Arms in Brass/Steel

Here is the product of a fancy, something less demanding than making something that really works. It was made relatively quickly from a page of sketches I made over a cup of coffee so it isn’t perfect. I’d probably change some details if I made another. I’ve written some construction notes and transcribed my pencil […]

Model Watt Governor – CAD Plans and Construction Notes

Having had a hankering to make a Watt-style governor but having failed to find any plans to my taste, I decided to design my own. Here it is, with 2D CAD plans produced with Draft-IT (and GIF images of the same) and my construction notes for download. The design is hand-cranked and lacking a valve […]

Towers of Hannoi in Metal

This easy piece of engineering, a small Towers of Hannoi set, was a break from more complicated engineering and completed as a Christmas present. Downloads: CAD Plans in Draft-IT format CAD Plans as GIF image Construction notes

Paradoxical Cones – the Uphill Roller

I came across an account of the “uphill roller” in a book by Julian Havil, “Nonplussed!”. The basic idea is that two cones, joined at the bases, will appear to roll uphill on a pair of diverging rails if the combination of the angles of the cones, slope of two rails and divergence of two […]